Best Oil Paints for Plein Air Painting: A Practical Guide for UK Artists

Choosing oil paints for outdoor painting is not as straightforward as it might seem. Walk into any art shop and you'll find dozens of brands, two distinct grades, and a price range that runs from a few pounds a tube to genuinely eye-watering sums. Add in the particular realities of painting outdoors in Britain, cold mornings, changeable light, damp air, and the need to carry everything on your back, and the decision starts to matter more than it might in a comfortable studio. This guide cuts through the noise and gives you honest, practical recommendations whether you're buying your first set of oil paints or wondering whether it's time to upgrade.

Why the Choice of Oil Paint Actually Matters Outdoors

In a studio, you can compensate for a lot. If your paint is a bit stiff, you add a touch more medium. If a colour mixes muddily, you clean your brush and try again. You have time, warmth, and good light. Outdoors, you have none of those luxuries in the same way. The light is changing constantly, your working time is shorter, and you're probably painting on a surface the size of a paperback novel. The paint you use has to work with you, not against you.

Consistency and Workability in Cold Conditions

British weather puts particular demands on oil paints. Even on a pleasant summer day in Scotland or the uplands of northern England, temperatures outdoors can be cool enough to make certain paints noticeably stiffer. Cold oil paint drags rather than flows, resists blending, and can make mixing on a small palette feel like spreading cold butter. High-quality paints with a good oil content tend to cope better in low temperatures than dry, chalky student-grade options. If you've ever struggled to pull a colour across a panel on a cold morning and assumed the problem was your technique, your paint may well have been part of the issue.

Pigment Strength and Colour Mixing on a Small Palette

Outdoors, you're typically working with far fewer colours than you would in a studio. A palette of six to eight colours has to cover everything: bright summer skies, deep shadow in woodland, the particular grey-green of British hedgerows. That demands paints with genuine pigment strength. A weak paint, heavily extended with filler, requires more paint and more mixing to achieve the colour you want. A high-pigment paint gets you there faster with less effort, which matters when the light is moving and you have ninety minutes before the clouds close in.

Artist-Grade Versus Student-Grade: What You Actually Need to Know

This is the question most beginners wrestle with, and the answer is more nuanced than most buying guides suggest.

The real difference between artist-grade and student-grade oil paints comes down to pigment load and consistency. Artist-grade paints contain more pigment relative to filler, which means stronger colour, more predictable mixing, and better coverage. Student-grade paints use cheaper pigments, more extenders, and sometimes substitute pigments that behave differently from their artist-grade equivalents. The result is paint that is perfectly usable but requires more of it to achieve the same effect, and which can sometimes mix less cleanly.

That said, student-grade is not a trap. For anyone just starting out, the savings are substantial, and the quality of the better student-grade ranges (Winsor and Newton Winton and Daler-Rowney Georgian in particular) is genuinely respectable. You can learn a great deal about colour mixing, palette management, and outdoor painting with student-grade paints. Plenty of accomplished painters have done exactly that.

The honest recommendation: start with student-grade if budget is a concern. Then, as you identify which colours you reach for most consistently, begin replacing those specific tubes with artist-grade equivalents. Upgrading one colour at a time is far more economical than replacing everything at once, and you'll quickly notice the difference in the colours that matter most to your palette.

One thing to avoid: very cheap unbranded or own-label paints at the bottom of the market. Quality drops off sharply at that level, and the money you think you're saving will frustrate you in practice. Stick with established brands even at student grade.

A note on series pricing: within artist-grade ranges, paints are divided into series (usually Series 1 through to Series 5 or beyond), with prices varying depending on the rarity of the pigment. Series 1 colours are always the most affordable, and many of the most useful landscape colours, Ultramarine Blue, Yellow Ochre, Burnt Sienna, sit in the lower series. Don't let the top-end price of a range put you off; you may not need those colours at all.

The Best Oil Paints for Plein Air Beginners

For beginners, the priorities are reliability, availability, and reasonable cost. You want paint that behaves consistently, that you can buy without having to order from abroad, and that won't leave you feeling you've wasted money if your first few sessions are more learning experience than finished painting.

Winsor and Newton Winton is the most dependable student-grade oil paint widely available in the UK. It handles consistently across the range, mixes reasonably cleanly, and you can find it in most UK art shops as well as online. It is not exciting paint, and it will not do anything that artist-grade paint won't do better, but for someone working through their first dozen outdoor sessions it is entirely fit for purpose.

Daler-Rowney Georgian is a solid alternative, often slightly cheaper, and available in most UK art shops. The colour range is wide, which can be useful if you want options without paying artist-grade prices. Handling is similar to Winton; both are perfectly capable beginner choices.

Jackson's Artist Oil Colours represent the best route into artist-grade at an accessible price. Jackson's have developed their own brand range specifically to offer genuine artist-grade quality without the premium of better-known names. For anyone who has done a handful of outdoor sessions with student-grade paint and wants to see the difference pigment quality makes, this is the natural next step. You'll need to order online from jacksonart.com, but delivery is quick and the price difference over established artist-grade brands is meaningful.

The Best Oil Paints for Intermediate and Experienced Plein Air Painters

Once you're painting outdoors regularly and have a clear sense of how you work and what your palette needs, it's worth investing in paints that give you more. The paints below are all artist-grade, and each has a distinct character worth understanding before you buy.

Michael Harding is a British brand, made in London, and it has a genuine reputation among serious painters for very high pigment load and minimal use of fillers or synthetic dryers. The paint comes out of the tube on the stiffer side, which can feel surprising if you're used to buttery student-grade paint, but once it's worked on the palette it becomes smooth and responsive. The colour intensity is exceptional. His dedicated Plein Air Set, ten 40ml tubes selected specifically for landscape painting, is a well-curated starting point if you want to try the range without committing to individual tubes across the full range.

Winsor and Newton Artists' Oil Colours are the most widely available artist-grade option in the UK. They're reliable, thoroughly documented in terms of lightfastness ratings, and available from almost every UK art supplier. They don't have the character or intensity of Michael Harding, but they're consistent and trustworthy, which counts for a great deal when you're outdoors and need to know how your paint will behave.

Williamsburg, available in the UK through Jackson's, is paint for painters who love the feel of oil paint as a material. It's slow-drying and notably buttery, with a distinctive, almost textured quality to the way it handles. Experienced painters who enjoy working with impasto or who like to return to a painting in the field will appreciate those qualities. It's not ideal for beginners, partly because the slow drying makes transporting panels more of a challenge.

Plein Air Sets Versus Building Your Own Palette

When you're starting out, the choice between buying a ready-made set and selecting individual tubes can feel like yet another decision on top of too many decisions. Here's how to think about it.

For beginners, a set is usually the right call. It removes one layer of decision-making at a stage when you already have plenty to think about, and the colour selections in well-designed plein air sets are usually intelligent. Michael Harding's Plein Air Set is a good example at the artist-grade level. Once you've painted outdoors enough to know which colours you genuinely use and which sit untouched in your box, building your own palette tube by tube gives you more control and less waste.

What About Alkyds and Water-Mixable Oils?

Traditional oils are the classic choice, but two alternative formats are worth taking seriously, particularly for plein air work. Both solve real problems that outdoor painters face, and neither deserves to be dismissed.

Alkyd Oils for Plein Air

Alkyd paints handle similarly to traditional oils but dry significantly faster, typically overnight rather than over days or weeks. For plein air painting, this is genuinely useful: it means you can transport a panel home without worrying about smearing a session's work. The trade-off is a narrower colour range and, in some pigments, a slight flatness of intensity compared to traditional oils.

Water-Mixable Oils for Plein Air

Water-mixable oils clean up with water rather than solvents, which removes one of the more awkward aspects of traditional oil painting outdoors: carrying and disposing of mineral spirits. For beginners who are put off by the practicalities of solvents, they're a sensible entry point. Quality has improved considerably over the years. Winsor and Newton Artisan is the most widely available option in the UK and is genuinely capable paint.

It's worth being honest that experienced painters and purists tend to gravitate back to traditional oils over time. The handling characteristics of water-mixable oils are slightly different once you start adding water, and some painters find them less satisfying to work with once they've developed a feel for traditional oil paint. But as a starting point, or as a practical solution for anyone who paints in situations where solvents are impractical, they're a legitimate choice, not a compromise you should feel embarrassed about.

Choosing Your Plein Air Palette: How Many Colours Do You Actually Need?

One of the most common mistakes beginners make is buying too many colours. A palette of fifteen tubes sounds reassuring but outdoors it becomes a liability. More colours means more time mixing, more tubes to carry, and more chances to get confused about what you're reaching for. Experienced plein air painters routinely work with six to eight colours and paint almost everything they encounter.

If you want to extend this palette without dramatically increasing complexity, consider adding a warm and cool version of your blue (Ultramarine is warm; Cerulean or Phthalo Blue are cooler). This opens up a wider range of mixed greens and sky colours without adding many tubes. Similarly, a cool red such as Alizarin Crimson alongside a warmer Cadmium Red gives you more flexibility for mixing purples and neutrals. But start with six. Get comfortable with what you can mix before adding more.

Practical Considerations for Using Oil Paints Outdoors in the UK

Cold Weather and Stiff Paint

In cold conditions, oil paint stiffens in the tube and on the palette. This is especially noticeable with high-pigment paints like Michael Harding, which are already on the stiffer side at room temperature. A practical solution: tuck your tubes inside your jacket for fifteen minutes before you set up. Your body heat is enough to soften the paint and make it considerably easier to work with. Once paint is on the palette it will warm up more quickly, especially if you're using a wooden or glass palette that you've kept indoors before heading out.

Transporting Wet Panels Home

Traditional oil paint stays wet for hours, sometimes days, depending on the pigment and the temperature. This creates a real logistical problem: how do you get a freshly painted panel home without ruining it? A panel carrier with slots that keep painted surfaces apart is essential kit. Alkyd paints or water-mixable oils dry faster and make this less of a concern. If you're committed to traditional oils, look for a pochade box with a panel-carrying slot built into the lid, which most decent boxes include.

Solvent Safety Outdoors

Painting outdoors is considerably safer than studio work when it comes to solvents, because you have natural ventilation. That said, there are still sensible precautions worth taking. Avoid using large quantities of turpentine, both because it evaporates quickly in wind and wastes quickly, and because it's the most irritating of the common solvents. Odourless mineral spirits are a better choice. Zest-It, a citrus-based solvent made in the UK, is worth knowing about: it's gentler, smells better, and is widely available from UK art suppliers.

Many experienced plein air painters use very little solvent outdoors at all. Lean, solvent-free mixtures using a small amount of linseed oil or an alkyd medium work well and mean less to carry and less to dispose of. If you're painting near rivers, coastal areas, or other water, be especially careful about solvent disposal. There are no specific UK legal restrictions on using oil paints outdoors, but environmental care around water is just common sense.

Where to Buy Oil Paints in the UK

Jackson's Art (jacksonart.com) is the strongest recommendation for most UK painters. The range is excellent, the pricing is competitive, and their own-brand range is genuinely good value. They stock most of the brands mentioned in this guide and deliver quickly.

Ken Bromley Art Supplies (kenbromley.co.uk) is particularly useful for buying in bulk or for tracking down specific tubes from a wide range of brands. Service is reliable and the range is strong.

Cass Art has physical shops in London and several other UK cities, which is useful if you want to see and handle paints before committing. Their online shop is fine but the in-store experience is the real advantage.

Great Art (greatart.co.uk) is worth knowing about, particularly for artist-grade materials from brands that aren't always well-stocked elsewhere. German-owned and reliable, they carry a range of paints that can be hard to find through other UK retailers.

One practical note: some US brands that are popular in American plein air circles, Gamblin in particular, are less easily found in UK shops. Jackson's is the most reliable UK source if you specifically want those brands, but given how strong the UK and European options are, there's rarely a compelling reason to seek them out over Michael Harding, Winsor and Newton, or Jackson's own range.

If you're just starting out, a single order from Jackson's covering a student-grade set, a few spare tubes in your most-used colours, and a bottle of Zest-It will give you everything you need to get outside and paint. From there, the best way to learn what oil paints work for you is the most reliable method available: use them outdoors, in real British weather, and see what they do.